Boiler house

Bottom blowdown systems

BBV selection guide:

BBV

4

3

P

W

S

U

S

S

DN20

PN40

PN/M

Valve series

Body material

Connections

Stem sealing

Seating

Type of trim

Trim balancing

Bonnet type

Bolting

Valve size

Connections

For alternative

connections to those

stated please contact

Spirax Sarco.

Version

BBV = Boiler blowdown valve

4 = Carbon steel

6 = Stainless steel

8 = Alloy steel

1 = Screwed

3 = Flanged

P = PTFE

H = Graphite

W = Stellite

S = Standard trim

U = Unbalanced

S = Standard

S = Standard

=

DN15, DN20, DN25, DN32, DN40, DN50 and DN65

1⁄2", 3⁄4", 1", 11⁄4", 11⁄2", 2" and 21⁄2"

EN standard = Flanged EN 1092 PN40, PN63 and PN100

ASME

= Flanged ASME 300 and ASME 600

standard

Butt weld

Socket weld

PN/M =

Air/waterpneumaticallyactuatedsuppliedwithamanual

actuation lever

M = Manually actuated complete with a manual actuation lever

BBV 4

3

P

W

S

U

S S

DN20

PN40 PN/M

Selection example:

How to order example: 1 off Spirax Sarco BBV43PWSUSS DN20 PN / M

TI-P405-51 AB Issue 1

BBV Automatic or Manually Actuated Boiler Blowdown Valves DN15 to DN65

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